A servant of Alsono's named Trinculo has also washed up from the boat, but separate from the other entourage. A storm comes up and Trinculo tries to find shelter from the storm. He runs into Prospero's servant Caliban and joins him under a cape to escape from the storm. While under there he hears the voice of Alsono's drunken butler, Stephano. The gentlemen meet up and Caliban tells them about the island in return for some of Stephano's alcohol. Wanting to leave Prospero's service, Calliban offers to be the servant of Stephano.
The Tempest: Novel Summary: Act 2, scene 2